n | a(n) |
---|---|
9 | 1 |
10 | 1 |
11 | 6 |
12 | 18 |
13 | 73 |
14 | 240 |
15 | 841 |
16 | 2714 |
17 | 8758 |
18 | 27259 |
19 | 83847 |
20 | 252929 |
21 | 754737 |
22 | 2225129 |
23 | 6505344 |
24 | 18867696 |
25 | 54384446 |
26 | 155892016 |
27 | 444839696 |
28 | 1264336132 |
29 | 3581584336 |
30 | 10116577962 |
31 | 28505061687 |
32 | 80146304124 |
33 | 224929999040 |
34 | 630259883854 |
35 | 1763574118096 |
36 | 4928881367449 |
[1,1,6,18,73,240,841,2714,8758,27259,83847,252929, 754737,2225129,6505344,18867696,54384446, 155892016,444839696,1264336132,3581584336, 10116577962,28505061687,80146304124,224929999040, 630259883854,1763574118096,4928881367449] |